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I have a problem with the results from OpenFlower. I am using the windows version. The simulation seems to run fine. The problem consists of a velocity inlet, a velocity outlet, a wall, and a pressure boundary. When I try to see the results in gmsh, only results from the initial timestep are readable. All the succeeding results are not readable, gmsh gives a "read error" for each of them. When I look at the .pos files for time steps >0, every second line looks like this: "1.#QNAN 1.#QNAN 1.#QNAN 1.#QNAN 1.#QNAN 1.#QNAN 1.#QNAN 1.#QNAN 1.#QNAN 1.#QNAN 1.#QNAN 1.#QNAN". I suppose maybe NAN meens "Not A Number"? How does this happen?
OK, I worked this out by myself. The solution simply isn't converging. (It's been some years since I last worked with CFD, and I forgot how frustrating it can be.)